Order: Pyrenulales       Family: Pyrenulaceae Species: Pyrenula laevigata Growth type crustose. Photos: The Burren, Co. Clare and Glengarriff woods, Co. Cork White or pale cream thallus without pseudocyphellae and usually without a prothallus. Frequently with +/- globose, black pycnidia forming lines across the thallus. Flattened perithecia 0.2-0.3mm diam. Spores 3-septate, (14-)17-22(-26) x (7-)8-9(-11) µm. Microscope photographs below. K+ yellow, C-, KC-, P-, UV- Rare, a western oceanic species occuring on smooth-barked trees, especially hazel.

Microscope photographs



Pyrenula laevigata. April 2009 and May 2012